Published December 22, 2019 © GPL3+

Add Radio Stations Reception to Your Arduino Projects

With Grove - FM Recevier, that spares you the amplification and demodulation stuffs.

BeginnerProtip1 hour579

Add Radio Stations Reception to Your Arduino Projects

Things used in this project

Hardware components

Seeed Studio Grove - FM Receiver

Seeed Studio Seeeduino Nano

Story

Video tutorial if needed

This tutorial is sponspored by Seeed Studio, Thanks.Products used: Seeeduino Nano (Arduino compatible board, similar to Nano)Grove – FM Receiver

Hello and welcome to another simple tutorial by SurtrTech, this one is about radio stations receiving using Grove FM Receiver, the module is straight forward, it needs only power and some speaker/headphones to function and of course a good radio reception, it spares you all the demodulations, amplifications, oscillator …. stuffs.

It’s based on one single chip SX6119 with a tuning range of 64 MHz to 108 MHz, and it has one button that can turn it On/Off, tunning and volume control. and it comes with a grove cable.

Grove – FM Receiver Seeed Wiki

Grove FM Receiver

Test 1

Well, the test 1 is straight forward, just power the module using some DC power source 3.3V to 5V which makes it compatible with most boards, hook up some speaker/headphones and it’s ready to tune (Check the video for the test).

No special wiring is required, and no single code is needed.

Test 2

Now, if you turn the module you’re going to notice D1 and D2 pins next to Vcc/GND ones, those pins will give you the possibility to control externally the On/Off and tuning button, unfortunately there’s no volume control ones.

Courtesy of SeeedStudio

And this is where the your board can intervene to control the radio as you want, add it to any project, like alarm clocks …. and basically any board that can generate a LOW level signal can control the module.

For our case I’ll be using Seeeduino Nano board, (if you don’t know how to install Seeeduino boards them check the video on this article), and you can of course use any Arduino compatible board with the following wiring and codes.

Wiring (Schematics below)

The wiring is very simple 5V/Gnd to power the module, and D1/D2 just wired with digital pins, the buttons are also wired with Gnd/digital pins.

N.B: I’m using “INPUT_PULLUP” as pinMode for both push buttons, which means they are constantly on HIGH LEVEL and when I press the button it goes to LOW LEVEL, you can of course wire them with 5V/3.3V add some pull down resistors and set the pinMode as “INPUT”.

Code (below)

P.S: I tried to read the buttons states and put it directly on D1/D2 (if the button is on High level –> High level will be on D1/D2 FM digital pins; same thing for low level), and so when I press it sends low level to the module to activate the function but it didn’t work !!

So in the code you’ll notice a function that deal with that.

Result

This is a small preview, you can of course turn On and Off the module using the “red button” and tune using “blue” one. Now it’s easy to integrate it in any projects.

Here's the link for the small preview (Hackster doesn't support it)https://videopress.com/v/UosWNe7g

Code

Grove_-_FM_Receiver.ino

/* This code works with Grove FM Receiver
 * It permits to control the On/Off and tunning functions via the Arduino board
 * Refer to www.SurtrTech.com for more details
 */

#define B1 2          //D2 and D3 are used as push button inputs
#define B2 3
#define DIFM1 4       //D4 and D5 are used as outputs to be wired with the module "D1" "D2"
#define DIFM2 5

bool B1_state, B2_state; //To read the button current state, 0 or 1

void setup() {
  
  pinMode(DIFM1, OUTPUT);       //pinMode setting
  pinMode(DIFM2, OUTPUT);
  pinMode(B1, INPUT_PULLUP);   //The push button are wired with their pins as above and with GND, so here they are always on high level
  pinMode(B2, INPUT_PULLUP);   //When you press it goes low
  digitalWrite(DIFM1, HIGH);   //FM module pins are set on HIGH, otherwise a low level signal will be sent it will start the module at the beginning
  digitalWrite(DIFM2, HIGH);

}

void loop() {
  
  B1_state=digitalRead(B1);    //Constantly reading the Button 1 and 2 state
  B2_state=digitalRead(B2);

  if(B1_state == LOW)        //if one of them is pushed it calls the function below
  ButtonP(DIFM1);

  if(B2_state == LOW)
  ButtonP(DIFM2);
  

}

void ButtonP(int x){      //The function takes the name of the pin to activate as argument
  
  digitalWrite(x, LOW);   //Sends LOW level signal for 3s then put it to high level
  delay(3000);            //This was the simple and functionning way to simulate a long press
                          //The low level signal couldn't be sent directly from the button --> Arduino --> module
  digitalWrite(x, HIGH);
}

Credits

SurtrTech

9 projects • 207 followers

YT Channel bit.ly/35Ai76l, run by Automation and Electrical Engineer, Electronics amateur, no IT background so you may see wreckage in codes

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Add Radio Stations Reception to Your Arduino Projects

Add Radio Stations Reception to Your Arduino Projects

Things used in this project

Hardware components

Story

Test 1

Test 2

Wiring (Schematics below)

Code (below)

Result

Schematics

Wiring

Code

Grove_-_FM_Receiver.ino

Credits

SurtrTech

Comments

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